<nz-tree #nzTree [nzData]="nodes" nzCheckable [nzCheckStrictly]="false" nzExpandAll nzMultiple [nzCheckedKeys]="defaultCheckedKeys"
  [nzExpandedKeys]="defaultExpandedKeys" [nzSelectedKeys]="defaultSelectedKeys" (nzClick)="nzClick($event)"
  (nzExpandChange)="nzEvent($event)" (nzCheckBoxChange)="nzEvent($event)">
</nz-tree>
<button nz-button nzType="primary" (click)="getTreeNodeStatus()">{{'获取组件半选状态节点'
  }}</button>